Real Experts. Real Results. Built for Amazon FBA Sellers.

Leviathan Sellers was founded in 2023 by Harishchandra Kevat in Vadodara — an Amazon FBA practitioner who experienced the reimbursement problem firsthand and built the solution they wished existed.

Who Is Behind Leviathan Sellers

We are not a faceless agency. Leviathan Sellers was founded by a real person with real Amazon FBA experience — and we want you to know exactly who you're working with.

Harishchandra Kevat, founder of Leviathan Sellers Amazon FBA service

Harishchandra Kevat

Founder & CEO — Leviathan Sellers

Vadodara, India · Founded 2023

“Leviathan Sellers was built specifically for the post-2025 landscape. Every process — daily auditing, manufacturing cost documentation, manual individual filing, active denial appeals — was designed from scratch around what Amazon now requires.”

I founded Leviathan Sellers in 2023after working closely with Amazon FBA sellers and seeing first-hand how much money was being silently lost to unclaimed reimbursements, fee overcharges, and IPI issues. When Amazon changed its reimbursement policy in 2025 — cutting the claim window from 18 months to 60 days and switching to manufacturing cost — most existing tools and services simply weren't built to handle it correctly.

We work with sellers on Amazon US, UK, India, Canada and EU, and every claim is handled personally with full documentation.

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Our philosophy

We Exist to Make Sure Every Dollar Amazon Owes You Gets Paid.

Amazon's fulfillment system generates discrepancies at scale. At the volume Amazon operates, a fraction of a percent in errors means real money — your money — sitting in Amazon's account instead of yours.

Our mission: identify every discrepancy, file every valid claim before it expires, document every case correctly under the current manufacturing-cost policy, and appeal every denial. No shortcuts. No automation that risks your account.

We are an authorised Amazon Selling Partner. Every action we take in your account is fully compliant with Amazon's current terms. Your account health is never at risk from our work.

How Reconciliation Works →

What we stand for

What We Stand For Every Day

Strict Compliance

Every action follows Amazon's current TOS exactly. No grey-hat tools, no bulk automation, no shortcuts.

Data-Driven Precision

Decisions based on transaction data, policy documentation, and Amazon's published standards.

Performance Accountability

Reconciliation is 100% performance-based. We are incentivised to maximise your recovery.

Full Transparency

Monthly statements show every claim filed and its outcome. Nothing hidden.

Global Expertise

US, UK, India, Canada, EU — localised documentation, currency-aware claims, marketplace-specific knowledge.

Daily Vigilance

The 60-day window means every day matters. We audit daily — never weekly.

Why Manual Expert Filing Outperforms Automation

96%

Our claim approval rate vs ~60% for automated tools

60

Days — claim window we monitor every single day

100%

Amazon TOS compliant — zero grey-hat methods, ever

48h

Free audit turnaround — results, no obligation

How We Compare to Automated Tools & Self-Filing

FeatureLeviathan SellersAutomated ToolsSelf-Filing
Manufacturing cost documentation✓ Every claim✘ Not includedManual effort required
Audit frequencyDailyWeekly or lessWhen you remember
Denial appeals✓ Included✘ Limited or noneManual only
60-day window compliance✓ GuaranteedPartial — often misses✘ Frequently missed
Amazon TOS risk✓ ZeroSome risk (bulk filing)Low
Claim approval rate✓ 96%+~60%Varies widely
Pricing modelPerformance-based onlyMonthly subscriptionYour time cost
US, UK & India support✓ All threeUS primarilyDepends on your knowledge

Work With a Team That Knows FBA Inside Out

Start with the free audit. No risk, no obligation. Know exactly what Amazon owes you within 48 hours.